Subdomains

The Domain Name System (DNS) has a tree structure or hierarchy, with each non-RR (resource record) node on the tree being a domain name. A subdomain is a domain that is part of a larger domain; the only domain that is not also a subdomain is the root domain.

demo.cyotek.com is a subdomain of cyotek.com, sub.demo.cyotek.com is a subdomain of demo.cyotek.com, however while demo2.cyotek.com is a subdomain of cyotek.com it is not a subdomain of demo.cyotek.com.

Tests

sub.demo.cyotek.com demo2.cyotek.com

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